新疆尼勒克县喀英迪地区铅锌矿地质特征及成因

喀英迪铅锌矿主要产于早石炭世阿克沙克组及其与晚奥陶世呼独克达坂组的接触带上。通过普查工作共圈定15个铅锌矿体。其中主要矿体4个,Ⅰ-4矿体处于晚奥陶世呼独克达坂组灰岩与早石炭世阿克沙克组的不整合接触面上及其两侧,工程控制总长度为523m,最大斜深100m。倾向70°～100°,倾角一般20°～50°,连续性较好。该矿体铅单工程厚0.86～5.64m,平均2.86m,厚度变化系数为70.57%;锌单工程厚0.80～5.64m,平均1.81m,厚度变化系数为93.97%,属于变化较稳定型矿体。铅单工程品位0.62%～16.47%,平均4.53%,品位变化系数114.34%;锌单工程品位0.53%～12.37%,平均3.78%,品位变化系数57.47%。属于有用组分分布较均匀型矿体。通过对矿床地质特征的研究,认为该矿床属沉积岩容矿的、层控的、构造控制非岩浆型低温热液矿床。

Geological Characteristics and Origin of Leadzinc Deposit in Kayingdi Area of Nileke County in Xinjiang Uygur Autonomous Region

Kayingdi lead-zinc deposit is mainly occurred in contacted belt of early Carboniferous Akeshake group and late Ordovician Hudukedaban group.Through general survey,15 lead-zinc bodies have been circled.Among them,4 are main ore bodies.Ⅰ-4 ore body is located in unconformity surface and its two sides of limetones in late Ordovician Hudukedaban formation and early Carboniferous Akeshake group.Its total project controlling length is 523m,and the maximum oblique depth is 100m.Its tendency is 70 ° ～ 100 °,dip angle is generally 20 ° ～ 50 °,and the continuity is good.Thickness of singel project is 0.86 ～ 5.64m,and average thickness is 2.86m,and thickness variation coefficient is 70.57%;zinc thickness of single project is 0.80～5.64m,average thickness is 1.81m,and thickness variation coefficient is 93.97%.It belongs to relatively stable changes deposit.Lead grade of single project is 0.62%～16.47%,average grade is 4.53%,and coefficient of variation is 114.34%;zinc grade of single project is 0.53% ～12.37%,average grade is 3.78%,and coefficient of variation is 57.47%.It belongs to the type which useful components can be distributed uniformly.Through study on geological characteristics of this deposit,it is regarded that the deposit is a sedimentary,layer controlling and structural controlling type non-magmatic hydrothermal deposits.